internal static UpdateAttempt CheckForPreviousAttempts(string tempFolderName, Version currentVersion, Version newVersion)
{
var attemptPath = GetUniformPath(tempFolderName, _attemptFileName);
UpdateAttempt attempt;
if (System.IO.File.Exists(attemptPath))
{
attempt = JsonConvert.DeserializeObject <UpdateAttempt>(System.IO.File.ReadAllText(attemptPath));
}
else
{
attempt = new UpdateAttempt {
Date = DateTime.Now, Version = newVersion
};
var attemptJson = JsonConvert.SerializeObject(attempt);
System.IO.File.WriteAllText(attemptPath, attemptJson);
}
return(attempt);
}
/// <summary>
/// Applies the update after it has been downloaded. Must be called after calling DownloadLatestUpdate.
/// </summary>
/// <param name="tempFolderPath">The path of the folder in which the update files are located.</param>
public static void ApplyUpdate(string tempFolderPath)
{
tempFolderPath = Helper.GetUniformPath(tempFolderPath);
UpdateAttempt attempt = null;
var attemptPath = Helper.GetUniformPath(tempFolderPath, Helper._attemptFileName);
if (System.IO.File.Exists(attemptPath))
{
var attemptJson = System.IO.File.ReadAllText(attemptPath);
attempt = JsonConvert.DeserializeObject <UpdateAttempt>(attemptJson);
}
var appFolder = Path.GetDirectoryName(Environment.GetCommandLineArgs()[0]);
string backupPath = Helper.BackUpAppFiles(appFolder);
try
{
var downloadedFiles = new DirectoryInfo(tempFolderPath).EnumerateFiles("*.*", SearchOption.AllDirectories)
.Select(info => Helper.GetRelativePath(tempFolderPath, Helper.GetUniformPath(info.FullName)));
var blackList = downloadedFiles.Where(p => System.IO.File.Exists(Helper.GetUniformPath(appFolder, p)))
.Union(attempt?.FilesToDelete);
foreach (var item in blackList)
{
if (!System.IO.File.Exists(item))
{
continue;
}
var newFileName = item + ".bak";
if (System.IO.File.Exists(newFileName))
{
System.IO.File.Delete(newFileName);
}
System.IO.File.Move(item, newFileName);
}
foreach (var file in downloadedFiles)
{
var tempPath = Helper.GetUniformPath(tempFolderPath, file);
if (System.IO.File.Exists(tempPath))
{
var newFileName = Helper.GetUniformPath(appFolder, file);
Helper.FileCopy(tempPath, newFileName);
}
else if (Directory.Exists(tempPath))
{
var newDirName = Helper.GetUniformPath(appFolder, file);
Helper.DirectoryCopy(tempPath, newDirName);
}
}
}
catch (Exception)
{
Helper.RollBackChanges(backupPath, appFolder);
throw;
}
finally
{
Directory.Delete(backupPath, true);
Directory.Delete(tempFolderPath, true);
}
}